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ASN Information Lookup - Autonomous System Analysis Tool

Look up ASN information using RIPE data to review announced and transiting prefixes for a public autonomous system. This is helpful for quick routing checks, peer reviews, and prefix inventory validation.

ASDot input is not supported yet.

Inputs

A single ASN in ASPlain or ASDot notation

Outputs

Neighbour ASNs (left and right)
List of announced IPv4 / IPv6 prefixes
Recent activity summary from RIPEstat

Use Cases

Pre-peering due-diligence on a candidate ASN
Reviewing a peer's announced footprint after a turn-up
Quick lookup before opening a deeper looking-glass session

Data Sources

RIPEstat Data API

Limitations

RIPEstat reflects what RIS observes; some regional visibility may be incomplete
Single ASN per query